diff -r 622887f7e954 -r 9e25f080a33e src/scene.c
--- a/src/scene.c	Thu Apr 24 19:53:40 2025 +0200
+++ b/src/scene.c	Fri Apr 25 18:38:08 2025 +0200
@@ -41,17 +41,25 @@
 #include <assert.h>
 
 void asc_scene_init(AscScene *scene) {
+    if (scene->root != NULL) {
+        asc_wprintf("Scene %"PRIxPTR" is already initialized - initialization skipped.", (uintptr_t) scene);
+        return;
+    }
     asc_dprintf("Initialized scene %"PRIxPTR, (uintptr_t) scene);
     // TODO: how should we initialize the camera?
     scene->root = asc_scene_node_empty();
 }
 
 void asc_scene_destroy(AscScene *scene) {
+    if (scene->root == NULL) return;
+
     asc_dprintf("Destroyed scene %"PRIxPTR, (uintptr_t) scene);
     asc_scene_node_free(scene->root);
 }
 
 void asc_scene_draw(AscScene *scene, asc_recti viewport) {
+    if (scene->root == NULL) return;
+
     // create render groups
     CxList *render_group[ASC_RENDER_GROUP_COUNT];
     cx_for_n(i, ASC_RENDER_GROUP_COUNT) {